LANCASTER – A woman found dead in Lancaster was identified today, and authorities sought her boyfriend as a “person of interest” in the case, along with her car, which is missing.

Lidia Castillo, 45, was found dead in the 2500 block of East Avenue I about 9 p.m. Sunday, according to sheriff’s deputies and the coroner’s office.

The cause of death will have to be determined by an autopsy. It was unclear if foul play was involved, the sheriff’s department reported.

“Detectives have learned that the victim had been living at the location with her boyfriend,” sheriff’s Sgt. Rich Pena said. “Family members went to the location last night to check on her welfare, since she had not been heard from since June 19th.”

Castillo’s car is missing, and her boyfriend, whose name was not released, was being sought as a “person of interest,” Pena said.

“Detectives are attempting to locate both (Castillo’s) car and the victim’s boyfriend,” Pena said.

The car was described as a red 2007 four-door Chevrolet Impala, Nevada license plate number 805YBH.

Anyone with more information on the case was urged to call the Sheriff’s Homicide Bureau, (323) 890-5500, or Crime Stoppers, (800) 222-TIPS.